Lifting-jack.



L. l. DARBY.

LIFTING JACK.

APPLICATION HLED APR. 1. 19m.

Patented Sept. 28, 1915.

2 SHEETSSHEET 1.

INVENTOR L /i 11D at]:

ATTORNEYS J WITNESSES: zfw/w Cir LEVI I. DARBY, OF NEWARK, NEW JERSEY.

IlIFTING-JACK.

p i a of Letters Patent Patented Sept cs ieia.

Applicationfiled hprn 1,1915. Serial No. 18,440 I To all in]; 0m it may concern Be it known that I, Luv]: LlDQ BY, a citizen ol? the United States, residing at Newark, in thecountyof Essex and" State of l scribed,; and then 'finally' embodied in the claimsiwhich' are appended to and which form an "essential part of tliisspecification.

New Jersey,'have invented. certain new and useful Improvements in Lifting-Jaoksyand I do hereb; declare the following to be a full, clear, and exact description of'the 'in- \(UltlOn such as will enable others skilled in 1 the art to which itappertains to make and use the same, reference being had to the ac-* companyiug drawings, and to characters of reference marked thereon, which form a part of this specification.

The present invention relates, generally,

to improvementsin lifting-jacks; and the invention refers, more particularly,to an improved constructii'in of lifting-jack Dfstlie lever true adated for eneral service 'fLIlCl" l v a: I, I l a I i particularly adapted for-use as an :auto1no;

bile jack.

T he invention has for its principal object to provide a very simple, cheap andefiiclent" construction of jachadapted tofoperate easily and quickly in l fting heavyweights and to securely support theweight lifted thereby; and a furtherobject10f the inven tion is to provide in iconn ection witli" the lifting mechanism a quick acting easily; operated means whereby .thefsaid lifting mechanism may be released from operative relation to the elevator-nielnber or lift stein so that the latter may be quickly lowered or returned from its lifting orsupportingpositiou to its normallylowered position;

The invention has for a furtherfobject'to provide in conl'iectlon with tlie'novel hitlngjfl incl; iuechanisn i a'permanently secured or attached operating lever; which may be Folded out (it the way when not 1n use so as to e ::ono1nize storage rooinjrequired by the jack: but at the same t me avoidingthe inconvenience and risk of loss entailed in the use. of separable or detachable operating 1e- Yer-s gencrallyused inconnection with the lever type of lifting jack.

Other objects of the present inventiomnot at this time moreparticularly enumerated,

will be clearly understood from the follow lug detailed description of theisaidyinvention. j

With the various objects of the present inventi on in View, the said invention consists, primarily. in the novel construction ofliftiug jack hereinafter set forth; and, furtlierniore, this invention consists in the here],

arrangements and combinations of the Vari which :will be presently I more fully de- The inrentionis clearly"illustrated in the accompanying drawings, in which t Figure 1 is a side elevation of the novel construction of'lifting' jack made according to and embodying theprinciples oi? the p res ent invention. 7 Fig. Qis avertical. longitudi naljsection of the same, Fig. 8 is a hori zonta'l cross section ol the same taken on line lever-member" and parts connected theredetail vertical longitudinal section similar to that shown in said Fig. but illustratin l ng mechanism the operation of the li under an upward oscillation of the lever nieinber; Fig. 5 is a similar 'i icw illustrating the operation of thelilting mechanism under'a downward oscillation of the levernielnber; and Fig. 6 is a siinilarvieu illus- "8+8 in said looking downward, the' V with being shown in elevation." Fig. l isea tratingthe operation of the releasing means wher'ebythe 1i fting Inechanis1n is released or disengaged ironi lifting or supporting relation to the elevator-member or lift-stein so that the latter may be lowered and thus returned to normal initial position. H

Similar characters of reference are c1115, ployed in all of the hereinahove described views toillustrate corresponding parts.

Referring now to the said drawings the reference character 1 indicates a complete *lit'ting jack, made according to and em loodying the principles of the present inren-- 'tion, the same comprising a base-member 2 to which'is riveted, or otheriiiise secured, the flanges 3 of a pair uprightsl, the latter 'being registered together face to tliace. con- -nectjcd to the outer faces of said uprights i "by ineans of bolts 5; or any other suitable fastening means, are a pair of casingplates 6 formedin their central longitudinal portions with out ardly bowed or channeled portions 7 which, when registered together provide an'interior centrally disposed and "longitudinally extending 'slideway 8,' in which is slid-ably disposed the longitudinally movable ele ator-nieinher' or Located between said casing-plates 6, ad-

jacent' to their upper ends, a pair olt spacing collars or b ocks 10 though wh h lift-stein 9, 11o

therethrough, is a cross-pin 20,

pass the bolts 11, or other suitable fastening means, by means of which the upper ends of said casingplates are rigidly secured to- I gether andproperl y spaced apart. The upper end of said elevator-member or lift-stem 9 projects oiuawardly from the upper end of said slideway 8 formed between the said casing-plates 6, and Qsuitably secured to this exterior end of saidelevatonmember or liftstem 9 is a suitably formed seat-portion 12. The said casing-plates 6, when secured to gether in the manner'above described; are arranged to provide an intervening'space 13. Pivoted on the fulcrum pins 14, adjacent to the lowerend of one of said casing plates 6, so as to be located at each side of said slideway'ttand within the space 13, are apair of upwardly extending check or stop-. bars 15 and 15 the same being provided at their inner marginal edges, respectively,

' with a-series of ratchet-teeth or serrations Y16 and 16,, The said check or stop-bars 15 and 15 are caused to normally move toward each other, and toward the slideway 8 by means ofv an interconnecting pull-spring 1'7, the respective endsof which are connected with the respective anchor pins 18 and 18 of the respective check or stop-bars 15 vand 15; 4 7

The 10 ver'or inner end of sald elevator-' member or lift-stem- 9 is bifurcated to provide a transversely extending receiving socket or slot 19. Extending through said lower or inner end of said elevator-member or liftstem 9, at right angles to said receiving socket or slot 19 so as to extend transversely upon said cross-pin 20within said receivingsocket or Slot 19, is the pivot-end 21 ofan cooperate with the ratchet-teeth or serra tions 16' of said check or stop-bar 15. Said lift-dog 24 is further provided at its upper end with an upwardly extending releasing 0219 26 adapted to engage and operate said cl ieuk or stop-bar 15, and at its lower end with a downwardly extending releasing-cam 26 adapted to engage and operate said check or stop-bar 15.. 7

Each casing-plate 6 is provided with a suitably disposed longitudinally extending slot 27. The outer and oppositeends of said cross-pin 20 project into and ride in Journaled to said pivot-end 21 of said level? the respective slots 27 of the respective casing-plates 6, and by their engagement therein not only serving as stops limiting the up wvard and downward movement of said elevator-member or lift-stem Sh bujt also serving to prevent any turning of the latter on its longitudinal axis which mi ht result in disarranging the proper relation of the liftdog 24 with the respective check or stop-bars 15 and 15'. i

7 Connected with the exterior end of said lever-member 22 is a handle-member 28, the same being coupled thereto by means of a coupling-plate 29 to which said handle-member 28 is rigidly secured. Said couplingplate-29- is provided with a slot 30, and at its end is'further provided. with a notch 31.

Passing through said slot 30 and screwing into-said lever-member 22 is the shank o l a lock-screw 32 provided with a knurled head i or finger-piece Connectedrigidly with said lever-member22 is an outwardly extending lugs 34. hen the handlemember 28 is desired to be operatively related to the lever-member 22, the same is alined there with and pushed forward until the net-ch 31 of said co ipling plate is brought into strad dling engagement with said lug 31, where-a upon-*thelock screw 32 is tightened up, thus binding said coupling-plate 29 against withv drawal from engagement with said lug As thus arranged any oscillation of the handle-member 28 up and down is readily transmitted to thelever-member 22.v After the handle-member 28'is thus related to the lever-member 22, the latter may be oscillated to operate the jack. An upward oscillation or swing of the lever-member 22 rocks the lift-dog 24 in one direction so that its tooth 25 inengagement with one of the ratchetteeth or serrations 16 of the check or stop-,

bar 15 operates as a fulcrum point for the leveiemember, thus causing the opposite tooth 25 to be swung upwardly: In thus moving upward the tooth 25 is forced into Lt engagement with the inclined surface of the ratchet-tooth or serration 16' of the check or stop-bar 15 immediately above it, forcing the latter to swing outwardly'against the tension of the pull-spring 17, until the said next ratchet-tooth or serration16 registers with the tooth 25", whereupon the pull-spring 17 pulls the check or stop-bar 15 back to normal position with said next ratchet-tooth or serration 16 registered beneath the tooth 25. I This operationtransmit's an upward lift to theicross-pin 20 connected, consequently raising the elevator-member or lift-stem one step. above described operations are more particularly illustrated in Fig. lof the accompanying drawings.) A downward oscillation or swing of the leveranember rocks i which is imparted also to the elevator-member or lift-stem 9 to which the cross-pin is (The , above ratchet-tooth or serration elerattn=mernloer or lift stein .9. I desoriloed operat ons are'l noreparticularly' the lift-dog 241: in the opposite direction so that its tooth 25 in engagement with one of the ratohetteeth or serrationslhof the eheok or stop-bar 15 operatesasa fulcrum point tor the leveemember, thus causing the above it, hireing the latter to swing outwardlv against the tension of thegpull-sprmg 17, until the said next above ratel'iet tooth'or serration 16 or thesecondabove reglsters with the tenures, whereupon the pull-spring v 1'? pulls the Check or stop-bar 15 batlrto normal posit-ion w th said next or second loreglstei'ed beneath the tooth This operation trains mitsanother upward litlt tojthe oross pin 20 which 13 also IlITlPtll'tMllO the elevator-member or lift-stem 9 to Whiehthe Cross-pm is connected. consequently producing another.

step in the upwz-uid lifting? movement of said illustrated in Fig. 5 drawings.) a

In the oil the aeeompanying above described Qmauner tl1e up and down oscillation of the lever-member produoefsa progressive stepbv stepfupward ifting movement ot thea,elevator- 4 inen'iber or lift-stenr$ to any. point \vi thinj. the limits of its maximum upward travel.-

lVhen the coupling-plate 23.) is operz-itively arranged to alinefthe handh member free upper end o'l' its bifureated portionprovides a "notch 31 of the ooul'iling-plate 20, from the with the lever-memher 22, the

stop-member 35 which when the levelf member is swung upward hunt v ward moveu'ient by engaging" the edge of one of the rasii1g-platesli. so that the levermember cannot be swung so far as to dis engage the pivotin" tooth 35 from proper engagement with i said leve]'-n'ieu' ber 22 is tlirther provided with a rigid or fixed stop-member 3(i,-pro1 25 from proper engagen'ient withathe ratehet teeth or serrations 1640f the check or atop-bar llfir After the lifting jaelt has operated to lift the eleratoran'emher or l iift stem to the desired point, and it is desired to: release the latter tronratsfllifted orl sup;

porting i'iosition and. lower the same to nor mal initial position, surh result inlay be I aooomplislieil as Follows: The look-screw is loosened a ad the llilIltlldzlllellllifil 28 and (The above ratchet-teeth .ori ser rations 16 of the oheol; orstop-bar 15 and lngs.)

its Coupling-plate 29 are drawn outwardly to remove said stop-member 35.1?1'0111 op erative posltlon, but said handle-meinhor28 and oouplingqflate 29 a re not drawn out so faras to disengagev the "handle-memlun..

from operative connection with said lever member After thestopanember 35 thusremoved, the leveraneinber-22 maybe swungupward beyond the limits of its nor 1 mal swing when. operating the lifting meohanism, and such additional upward moven'ientosolllates or turns saiddiitdog. 24 so as to oarrysaid upwardly extending I releasing-cam 26in outwardly pressingerr gagement with 'SfllCl check or stop b'ar l5, and said downwardlyextending .releasingoam 726. in outwardly pressing engagement. This .op-'

withsaid .oheok or stop-bar 1.5. eration moves apart the respective cheek orfstop-bars 15 and 15 against the tension of the pull=spring 17, and removes the re speetive ratchet-teeth or serrations l6 and 16" of the same from the path of downward movement of said respective teethflir and 25 of "the lift-dog Qel thus removing all trated more particularly in Fig. (3 of the accompanying drawings) 1 When 1t 18 desired to pack or store away the'liitingjack, the outwardly extending hand]e-member 28 may be folded down parallel to the body of the jack hv loosen,

ing the loek-sorewfl 32,and drawing out.

ward the handie-member to disengage the lug .34, thus permitting the coupling-plate and;handle-memian' to .pivot on theloeltscrew 32, and thus swing downward against thebody of the jack. (All 01 which is 9O obstruction to thedesoentoit the elevator? emember. or llit stem 9 lathe slulewav R.

shown by the dotted representation of the U handle-member and coupling-plate illus trated in Fig l of the acooinpairvimg draw Thus it will be. readily l'liikli l'filtltillg that the jackmav he oompaotedyto store away in a eomgarativelv small space.

One otthe advantages of the. noveleonstruotion of lifting-jack as above deserihed,

and 'not previously mentioned, that same may be eonstrueted oli' sheet-metal. when made in the sn'ialler sizes, and thusv may be easil va and eheaplv inanui'aotiired by (lie and. stamping operations. I am aware that some changes may be i made in the various arrangements and com; binations of the various devices and parts as well as in the details of the oonstruotion thereof, WVltl'lOtll; departing from the scope of my present invention. ,Hence. 1 do not limit my inventionto the exact arrangements scribed in the foregoing specification, nor do andeombi'nations of the said. parts as dig I confine myself to the exact details of the construction of the same as shown in the accon'ipanying drawings.

I claim. a p

1. it a lifting-jack a casing, a lift-stem slidably supported in said casing, a lift-dog pivoted to the lower end of said lift-stem having a tooth projecting from each side thereof, a lever-member for'oscillatin'g said lift-dog, a pair of pivoted check-bars mounted within said casing so as to 'permit said lift stemto move between the same and provided at their inner marginal edges with a" series of ratchet-teeth between which said lift-dog is arranged so that its oppositely ex tending teeth cooperate with the ratchetteeth of said respective check-bars, an interconnecting pull-spring for moving said check-bars normally toward and in contact with'said lift-dog, and said lift-dog being" further provided with an upwardly andai downwardly extending releasing-cam adapted respectively to remove said respective check-bars from operative relation to the teeth of said lift-dog when said releasing cams are carried into engagement with said I checkbars by an additional or abnormal swing or oscillation of said lever-member;

2. In a lifting-jack a casing, a' lift-stem slidably supported in said casing, a lift-dog pivoted to the lower end of said lift-stem having a tooth projecting from each side thereof, a lever-member for oscillating said lift-dog, a pair of pivoted check-bars mounted within said casing so as to permit said lift-stems to move between the same and provided at their inner marginal edges with a series of ratchet-teeth between which said lift-dog is arranged so that its oppositely extending teeth cooperate with the ratchetteeth of said respective checlcbars, an interconnecting pull-spring for moving said check-bars normally toward and in contact with said lift-dog; said lift-dog. being fur ther provided with an upwardly and a downwardly extending releasing-cam adapted respectively to remove said respective check-bars from operative relation to the teeth of said lift-dog when said releasmgcams are carried into engagement with said check-bars by an additional or abnormal swing or oscillation ofsaid lever-member, a

fixed-member for limiting the normal oscillati on of sa1d lever-member in one direction;

and a removable stop-member for limiting the normal oscillation of said lever-member in the opposite direction, but permitting when removed an abnormal oscillation of said lever-member for the operationthereby of said releasing-cams.

In a lifting-jack'a casing, a lift-stem slidably supported in said casing, a lift-dog.

pivoted to the lower end of said lift-stem having a tooth projecting from each side thereof, a lever-member for oscillatmg sa1d Lewes lift-dog, a pair of pivoted check-bars mounted within sa1d casing so as to permit sa1d lift-stem to move between the same and pro vided at their inner, marginal edges with a series of ratchet-teeth between which said tending teeth cooperate with the ratchetteeth of said respective check-bars, an interconnecting pull-spring for moving said check-bars normally toward and in contact with said lift-dog and means for limiting the upward and downward movement of said lift-stem.

' 4. In a lifting-jacka casingya lift-stein slidably supported in said casing, a lift-dog pivoted to the'lower endof said lift-stem having a tooth projecting from each side thereof, a lever-member for oscillating said lift-dog, a pair'of pivoted check-bars mounted within said casing so as to permit said lift-stem to move between the same and pro vided at their inner marginal edges with. a series of ratchet-teeth between which. said lift-dog is arranged so that its oppositely ex- 1 tending teeth cooperate with the ratchetteeth of said respective check-bars, an interconnecting pullspring for moving said check-bars normally toward and in contact with said lift-dog, said lift-dog being furthereof, a lever-member for oscillating said l1 tt-dog, a pair or pivoted check-bars mount ed wlthin said casing so as topermit sa1d lift-stem to move between the same and pro vided at their inner marginal edges with a '70 lift-dog is arranged so that its oppositely ex- 7 5 li'lt-dog'f pivoted to the lower end of said litt-stem having a tooth projecting from each side series of ratchet-teeth between which said lift-dog is arranged so that its oppositely ex tending teeth cooperate with the ratchet teeth of said respective check-bars, an interconnecting pull-spring for moving said check-bars normally toward and in contact with said lift-dog, said lift-dog being further provided with an upwardly and a downwardly extending releasing-cam adapted respectively to remove said respective check-bars fromop'erative relation to the teeth of said lift-dog when said releasingcams are carried into engagement with said checlebars by an additional or abnormal swing or oscillation of said lever-member, a fixed stop-memberfor limiting the normal oscillation of said lever-member in one direetion, and a removable stop-member for In testimony, that I claim the invention limiting the normal oscillation of said 1everset forth above I have hereunto set my hand is member in the opposite direction, but perthis 30th day of March, 1915. niitting when removed an abnormal oscilla- LEVI I DARBY =1 tion of said lever-member for the operation thereby of said releasing-cams, and means Witnesses: v for limiting the upward and downward FREDK C. FRAENTZEL, movement of said lift-stem. FREDK H. W. FRAENTZEL.

Copies of this patent may be obtained for five cents each, by addressing the C'ommissioner of Patents,

Washington, D. 0. 

